------------[ cut here ]------------
WARNING: CPU: 0 PID: 1107 at ./include/net/netdev_lock.h:17 netdev_assert_locked include/net/netdev_lock.h:17 [inline]
WARNING: CPU: 0 PID: 1107 at ./include/net/netdev_lock.h:17 netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41
Modules linked in:
CPU: 0 UID: 0 PID: 1107 Comm: kworker/u8:6 Not tainted 6.15.0-rc1-syzkaller-00412-g4e34a840613b #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:netdev_assert_locked include/net/netdev_lock.h:17 [inline]
RIP: 0010:netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41
Code: 1c 24 44 29 eb 4c 89 e8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 4a 01 00 00 41 89 5d 00 31 c0 e9 4d fe ff ff e8 85 ec c3 f7 90 <0f> 0b 90 e9 2c fa ff ff e8 77 ec c3 f7 90 0f 0b 90 42 80 3c 3b 00
RSP: 0018:ffffc90003b7f060 EFLAGS: 00010293
RAX: ffffffff89ff68eb RBX: 0000000000000000 RCX: ffff8880278eda00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003b7f190 R08: ffffffff89ff630c R09: 1ffff11006ad8ddc
R10: dffffc0000000000 R11: ffffed1006ad8ddd R12: ffff88805e60c000
R13: ffff888033602c80 R14: ffff888033602c80 R15: ffffc90003b7f1e0
FS:  0000000000000000(0000) GS:ffff888124fa5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009030 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_genl_dev_notify+0x1fb/0x450 net/core/netdev-genl.c:102
 netdev_genl_netdevice_event+0x81/0xa0 net/core/netdev-genl.c:-1
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2264 [inline]
 call_netdevice_notifiers net/core/dev.c:2278 [inline]
 unregister_netdevice_many_notify+0x1572/0x2500 net/core/dev.c:12025
 unregister_netdevice_many net/core/dev.c:12088 [inline]
 unregister_netdevice_queue+0x383/0x400 net/core/dev.c:11941
 unregister_netdevice include/linux/netdevice.h:3373 [inline]
 nsim_destroy+0x21e/0x690 drivers/net/netdevsim/netdev.c:1064
 __nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1428
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline]
 nsim_dev_reload_destroy+0x28a/0x490 drivers/net/netdevsim/dev.c:1661
 nsim_dev_reload_down+0x98/0xd0 drivers/net/netdevsim/dev.c:968
 devlink_reload+0x1ac/0x8c0 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1f5/0x450 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 ops_undo_list+0x154/0x8b0 net/core/net_namespace.c:233
 cleanup_net+0x530/0x940 net/core/net_namespace.c:684
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>